B be two sets. I'm looking for really fast or elegant ways to compute the set difference (
A - B or
- Gecko-specific tricks are okay
- I'd prefer sticking to native functions (but I am open to a lightweight library if it's way faster)
- I've seen, but not tested, JS.Set (see previous point)
Edit: I noticed a comment about sets containing duplicate elements. When I say "set" I'm referring to the mathematical definition, which means (among other things) that they do not contain duplicate elements.